LTC2903CS6-D1#PBF Linear Technology, LTC2903CS6-D1#PBF Datasheet

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LTC2903CS6-D1#PBF

Manufacturer Part Number
LTC2903CS6-D1#PBF
Description
Manufacturer
Linear Technology
Datasheet

Specifications of LTC2903CS6-D1#PBF

Voltage Supervisor Type
Voltage Monitor
Number Of Voltage Supervisors
4
Monitored Supervisor Voltage
3.086/0.5/0.5/Adj
Package Type
TSOT-23
Operating Temperature Classification
Commercial
Operating Temp Range
0C to 70C
Pin Count
6
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC2903CS6-D1#PBFLTC2903CS6-D1
Manufacturer:
LT
Quantity:
5 321
Company:
Part Number:
LTC2903CS6-D1#PBFLTC2903CS6-D1
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC2903CS6-D1#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
CONVERTER
Multivoltage Systems
Optical Networking Systems
Cell Phone Base Stations
Network Servers
Ultralow Voltage Reset: V
Monitor Four Inputs Simultaneously
3.3V, 2.5V, 1.8V, ADJ (LTC2903-A1)
5V, 3.3V, 2.5V, 1.8V (LTC2903-B1)
5V, 3.3V, 1.8V, –5.2V (LTC2903-C1)
3.3V, ADJ, ADJ, ADJ (LTC2903-D1)
5V, ADJ, ADJ, ADJ (LTC2903-E1)
Guaranteed Threshold Accuracy: ±1.5% of
Monitored Voltage over Temperature
10% (A1, B1, C1) and 5% (D1, E1) Undervoltage
Monitoring
Low Supply Current: 20µA Typical
200ms Reset Time Delay
Active Low Open-Drain RST Output
Power Supply Glitch Immunity
Low Profile (1mm) SOT-23 (ThinSOT
DC/DC
5V
3.3V
2.5V
1.8V
U
C1
0.1µF
C2
0.1µF
V1
GND
V2
LTC2903-B1
CC
= 0.5V Guaranteed
U
RST
V4
V3
2903 TA01
TM
) Package
SYSTEM
LOGIC
DESCRIPTIO
The LTC
common reset output remains low until all four inputs
have been in compliance for 200ms. Voltage thresholds
maintain ±1.5% accuracy over temperature (with respect
to the monitored voltage). The LTC2903-1 features an
open-drain RST output with a weak internal pullup.
Internal supply voltage (V
voltage on the V1, V2 inputs. V
LTC2903-E1. The RST output is guaranteed to sink at least
5µA (V
conduct current down to 0V. Quiescent current is 20µA
typical, making the LTC2903-1 ideal for power conscious
systems. The LTC2903-1 is available in a 6-lead low profile
(1mm) SOT-23 package.
ThinSOT is a trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
vs External Pull-Up Current and Input Supply Voltage
OL
®
Monitor in 6-Lead SOT-23
2903-1 monitors up to four supply voltages. The
= 0.15V) for V
Low Voltage Reset Pull-Down Performance
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
Precision Quad Supply
0
1µA
0.1
2µA
V
5µA
0.2
IN
U
, INPUT SUPPLY VOLTAGE (V)
0.3
20µA
CC
10µA
0.4
CC
down to 0.5V and will typically
) is generated from the greater
0.5
CC
0.6 0.7
V
LTC2903-B1
IN
= V1 for LTC2903-D1 and
= V1 = V2 = V3
0.8
LTC2903-1
2903 TA01b
0.9
1
29031f a
1

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LTC2903CS6-D1#PBF Summary of contents

Page 1

... Quiescent current is 20µA typical, making the LTC2903-1 ideal for power conscious systems. The LTC2903-1 is available in a 6-lead low profile (1mm) SOT-23 package. , LTC and LT are registered trademarks of Linear Technology Corporation Package ThinSOT is a trademark of Linear Technology Corporation. ...

Page 2

... U RATINGS PACKAGE/ORDER + 0.3V) CC ORDER PART NUMBER LTC2903CS6-A1 LTC2903CS6-B1 LTC2903CS6-C1 LTC2903CS6-D1 LTC2903CS6-E1 LTC2903IS6-A1 LTC2903IS6-B1 LTC2903IS6-C1 LTC2903IS6-D1 LTC2903IS6-E1 Consult LTC Marketing for parts specified with wider operating temperature ranges. (LTC2903-A1) The ● denotes the specifications which apply over the full = 25° 3.3V unless otherwise noted. ...

Page 3

ELECTRICAL CHARACTERISTICS operating temperature range, otherwise specifications are at T SYMBOL PARAMETER V 3.3V, 5% Reset Threshold RT33 V V2 Adjustable Threshold RTAV2 V V3 Adjustable Threshold RTAV3 V V4 Adjustable Threshold RTAV4 (LTC2903-E1) The ● denotes the specifications which ...

Page 4

LTC2903 TYPICAL PERFOR A CE CHARACTERISTICS 5V Threshold Voltage vs Temperature 4.500 4.475 4.450 4.425 4.400 4.375 4.350 – –25 TEMPERATURE (°C) 29031 G01 1.8V Threshold Voltage vs Temperature 1.625 1.615 1.605 1.595 1.585 ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Supply Currents vs Temperature 25 LTC2903-E1 20 LTC2903- – 100 –25 TEMPERATURE (°C) 29031 G20 RST Output Voltage with 10k Pull- 5.0 V1 ...

Page 6

LTC2903 TYPICAL PERFOR A CE CHARACTERISTICS RST Pull-Up Current vs V2 –90 LTC2903-A1, -B1, -C1 V1, V3, V4 ABOVE THRESHOLD –80 –70 –60 –50 –40 –30 –20 V RT25 – 0 (V) ...

Page 7

CTIO S V1 (Pin 1): Voltage Input 1. Internal V the greater voltage on the V1 and V2 inputs. V options D1 and E1. Bypass this pin to ground with a 0.1µF (or greater) capacitor. ...

Page 8

LTC2903-1 W BLOCK DIAGRA GND GND 2 8 (LTC2903-A1, LTC2903-B1) – V1 POWER DETECT V2 + – RESET DELAY GENERATOR + 200ms ...

Page 9

W BLOCK DIAGRA GND APPLICATIO S I FOR ATIO Power-Up The LTC2903-1 issues a logic low on the RST output when an input supply voltage resides below the ...

Page 10

LTC2903 APPLICATIO S I FOR ATIO current sinking ability for single supply and triple supply- tracking applications. Figure 2 shows a detailed view of the reset pin voltage with a 10k pull-up resistor to V1. The LTC2903-1 supervisors ...

Page 11

U U APPLICATIO S I FOR ATIO Table 1a contains suggested 1% resistor values for the ADJ inputs to obtain nominal –11.5% thresholds. Connect unused supervisor inputs to the highest supply voltage available. Table 1a. Suggested 1% Resistor Values for ...

Page 12

LTC2903 APPLICATIO S I FOR ATIO The powered system must work reliably down to the lowest voltage in the threshold band or risk malfunction before the reset line falls. In the 5V example, using the 1.5% accurate supervisor, ...

Page 13

U TYPICAL APPLICATIO S Fixed Quad Supply Monitor with LED Indication on RST Quad Supply Monitor with Adjustable Input 1 6 3.3V V1 RST C1 LTC2903-A1 0.1µF 76. GND 100k 0.1µ 2.5V V2 ...

Page 14

LTC2903-1 U TYPICAL APPLICATIO S Quad Supply Monitor with Unused Input Pulled Above Threshold Quad Supply Monitor with 3 Adjustable Inputs Monitoring (V = 1.685V) TRIP RST C1 LTC2903-C1 0.1µ GND V4 C2 ...

Page 15

... MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. U ...

Page 16

... User Selectable Combinations, Adjustable Timers 16 User Selectable Combinations, Adjustable Tolerance Pin Selectable Thresholds 8-Lead SOT-23 and DFN Packages <0.4% Margin Voltage Precision 3 (LTC2921) and 5 (LTC2922) Remote Sense Switches Tracks Up and Down, Supply Sequencing LT/TP 1004 1K • PRINTED IN THE USA © LINEAR TECHNOLOGY CORPORATION 2003 29031f a ...

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